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为使镀锌层抗腐蚀,通常采用铬酸盐钝化,由于铬酸盐钝化的废水排放严重污染环境和水源,西方和北美已禁止使用与铬酸盐有关的电镀和钝化,为了适应生产发展和环境保护的需要,用镀锌无铬钝化新工艺取代铬酸盐钝化工艺,从根本上解决了环保问题。
Chromate passivation is often used for corrosion resistance of the galvanized coating. Chromate-related plating and passivation have been banned in the West and North America due to the chrome-acid-contaminated effluent discharge that pollutes the environment and water sources. In order to accommodate Production development and environmental protection needs, replacing the chromate passivation process with a new chromium-free passivation process, fundamentally solve the environmental problems.